add missing vhListenSocket.clear(); to CNetCleanup()

src/net.cpp

@@ -1784,6 +1784,7 @@ public:
             delete pnode;
         vNodes.clear();
         vNodesDisconnected.clear();
+        vhListenSocket.clear();
         delete semOutbound;
         semOutbound = NULL;
         delete pnodeLocalHost;